First lady Michelle Obama smiles as she and her husband U.S President Barack Obama wait for Mexican President Felipe Calderon and his wife Margarita Zavala to arrive for a State Dinner at the White House on May 19, 2010 in Washington, DC. President Obama welcomed President Calderon to the White House today for an official state visit that is taking place amid tension over immigration politics and Mexico's deadly drug war.
(May 18, 2010 - Source: Mark Wilson/Getty Images North America)
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